mcgregor



, Jan. 29, 1924. 1,431,920

J. D. MCGREGOR PRICEA SCALE Filed Aug. 14 1922 5 Sheets-Sheet 1 Jan. 29, 1924.

J. n. McGREGoR PRICE SCALE Filed Aug. 14

5 SheetsShest z a. an my i? J. D. MCGREGOR Jan. 29, 1924.

PRICE SCALE s sheets-sheet 3 Filed Aug 14. 1922 Jan. 29, 1924. 1,481,920

J. D. McGREGoR PRICE SCALE Filed Auf-Y.. 14 1922 Jan. 29, 1924.

1,481,92 J. D. McGREGoR PRICE SCALE Filed Aug. 14. 1922 5 Sheets-Sheet 5 form tliebasehousingtogetherhvvith its contained lever and oke mechanismas low and compact as Ipos s1ble,..so l as .to reduce ,the'j embodying the present invention.

Patented Jan. 29, 1924.

UNITED s 'rATiE's' PATENT OFFTCE.

JAMES D. MUGREGOR, OF BRANTFORD, ONTARIO, CANADA, ASSIGNOB TO BBANTFOBD COMPUTING SCALES, LTD., 0F BRANTFORD, CANADA, A CORPORATION OF CANADA.

razon soALn Application led August 14, 1922. Serial No. 581,801.

price scales, more especially to that type of 4 price scale commonly known as fan chart` scales, wherein the chart is 0f segmental forni and for co-operatingfwith it ,there is a Swingin indicator controlled'by a pendulum weig t, lwhich latter alsogforms rthe counterbalance for the goods placedon the latform. The platformt is located ata lowerevel than the chart:and.indicatr.butim mediately abovethe basewvhicnfrests on a counter' or other supportand irgfrontv of the upstanding housing in which the cha-rtand pendulum wei ht are located.', In scales o thisv type it is desirable to height-, Aof theg.platform andato enablefthe chart tothe brought down tditheflevel or ap proximatelvthe levelpftlie 4eyes :o fthe V n l 'base'castingand housing and-with'the front user, but it. is obvioustliat with such -anarrangement. diiculties will be encountered u in, connection .with the proper location and t .functioning of the checkimechanism; for the yoke-and of the dashpot or vibration regulatingQ-meclianism, such as has to4 be employed in .connection with all sucoe'ssiul and accurate scales-:ofzthis kind. c VAmong the objects-.of the Apresent invention ifs=the; provision.of a .scalewhich .will accomplish the ends above indicated and at the .same time so simplify and arrange the operating parts that they maygbeentirely enclosed, leaving noiopportunity feathe merchant ,-1 :to 'so manipulat e tlie .exposed beams and parts that the.cust omer niay be cheated'-without.being aware oftheffact. v

.A further 4object .of the, invention is to pendent of the enclosing housing, .whereby twoiimportant advantages areI attained. The

first and most important advantage lies in the fact that, by this construction, the upstanding parts which support the pendulum, indicator and chart may be so designed and made of material which will not change its form through age or curing, and being supported rigidly upon the base casting there is no danger of distortion after the scale is once calibrated and sealed. The second important advantage derived from this construction lies in the fact that, in the shipment or handling of the scale by grasping or engagement with the enclosing housing vany distortion of the housing by reason of the forces applied to it in shipment or in handling are not transmitted to the 4bearings or Working parts of the scale, and hence the operativit'y.

Incarrying' the invention into effect, certain changes in details of construction of the-operating parts and in'tlieir relation and the invention. therefore, consists in such featuijes'and others which will be 'apparent from the following description.

Referring to the 'accompanying draw- Figure 1 ig'afipit invitait-jef assale Fig. 2 is a top'pla'n view off-the same.

Fig. 3 is a vertical sectionf'through" the ofthe upstanding .housing removed to4 show the .i general form and arrangement of the tree and pendulum weight and indicator su ported thereb iig.' 4 is a sectional elevation in a" vertical plane at right angles to the plane of the secT tion,Fig.3. 'f5

Fig 5 isa top plan view of the base cast'- ng scale leverandyoke; the check arm of Fig. '6 is a sectionalperspective view of the ldashpot or'vibration controller and reg- Figi? is a detaill'view, partly in section,

of "the pendulum Weightand eccentric for" the strap connection with the scale lever.

Fig. 8 is a detail of the means for holding the platform on its support or spider.

Eig. 9 is a pers ctive v iew of the pref- 4 ferrel form of chec link. Fig.`.10 is atop' plan view ofthe'same,

thelatter'being shown in section' and the platform support removed.

als

or into contact with the upright part of the scale.

The central portion of the spider M 1s f:ut away to 'l'orni an opening corresponding to the circular opening in the yoke, this opening being preferably rabbete'd for the reception of a cover plate N which serves to conceal the screws uniting the spider n nd volie and also as a, convenient means for the attachment of the stem of the plunger of the dashpot, and :Ls a dial for the vibration regulator.

Immediately below this opening is the opening in the base casting, and the dnshpot O is mounted preferably 'by being inserted from the lower side through the opening and having its base flange O astenedlo the base casting by suitable screws or otherwise. This location of the dashpot is immediately below the center of 4the platform. spider and the stern of the plunger or piston O2 in the dashpot extends up through .a sleeve in aV screw cover O?, and at its upper end is passed through an opening., in the aforesaid plate \T.- ,A cross pin n'passes transversely through the endV of the stem and, being coveredhy a bearing plete .L serves to complete the loose ivotaal ettachment of the piston to the ,p atform spider or yoke.- 7^

For the purpose of regulating the resistance to the transferof the oil or liquid in the dashpot fromone side o the piston to .i the other, the stein 1s provided'vvith a. ,cen-

tral opening at.- the bottom which merges into transverse openingsO above the pisf ton, and surrounding the stemis a, sleeve O5 havngcorresponding transverse openings therein. Bytherotationo the sleeve with relation to the piston stemor rod, the size of the openingsor passages may regulated so as torcontrol. the aetonof the dashpot. The upper end provlded with an arm O, the end of nwhich projects through .a segmental slot in the plate N and serves as a means whereby rthe action of the dashpot may be regulatedsQ es to compensate forthevariatiqnjn liuidity of the oil under chengesjn temperature; f

As a convenience of construction the sleeve Os is at its upper end provided with e, tzr pered screw-threaded enlargement which will screw tightly into the sleeveon the cover O3 of the dashpotwhen the parts -are,pe r mitted to come together, and in shipping the scale itllis customary to detach ethe -piston rod `from the platform spiderA or yoke lsind allow it .to dropdown toys level :where the plugmny be .screwedinto theftop :of the dashpot so es to preventnny.possiblescape of. olherefrom and Withoutfthe ,use o fff-J. packing washer. The slceveionthe cover Q8 projects down into ,the ,dashpotua :sufficient distance; to form ,a chanilieg'togeecommg date the oil above the plunger should the of thev sleeve scale'be inverted during shipment, thus inv creasing the safegu'rd-.ngainst leakage.

The molvenent'sfof the working parts or' the scale are limited to movements which are sufficient onl')l to carry the-indics'itorV throughout'the `desired range, and it is one of the objects of the present invention to provide meilns whereby these movements may be limited by stops which are so positioned to reduce Vany possible injury -to either the working parts of the scale or tozthe casing. Thus, there is located in the bottom casting of the scale :in adjustable lever stop P `:against which the lever will strike when Vthe lever moves so as to carry the indicator' to ap proximately two ounces over the capacity.

ll`his s to may well be in the form of a screw threade pin P adjustable in 'u screw threadedsoclret formed on thebasecasting lli.Y The indicator or 'pivoted' arm, including the. endulum weight, which parts are o soi-ne Weigl'ii; and therefore have some -inertile, are stopped in their movement b vfixed stop'sivhich fire rnonnted directly'on the tree B, theseflstopsi-bein?? so'lc'teil that they contact :with integral partsf dif'the structure which Aforns" Uthe counterbalance weight. The lower stqp'l", griff. 3) is iii position to Conte?? detly 'vi lf 'lie bedvof the pendulum,we1.ght',`r1v hlile theipper stQP 1,): is in upositr'oniwto con act witlr"s.`1`iint,egral uprvgirdl'y 'entendi'n`gmzrm. on the -'weight C. Thuslithe adistble weight; C P- the P811- .dulum is notlabletobelthrovvi 'out -of adjustment by( echte@ Vith 'a' l'nStoii, es iSgQ-llfn@ l? 55.6 i 'i l pfsehtenerderke i upvvg'id i" jtensipn of: 'the' indcetor wells Pre $132121? chgirt 'anilnexhtiends down in .',pae1le1 reach on .the Side; While `theicijuel indi# @regelement .is #.Wx' rimmed@ the extremer@ .Otlie' ernipiefter PSSs through, eine n .tie beni-imei@ of-th Seme ettheeifgel .he bye spigirielnlecsre .t0 eproto 01'1 01T near thevbaseof the arm. This arran ement 'forrns an eenurete .strai'ht .line ,in fcator an'flpne ASpitiiregjgf serpf'evs.to fold the same taut on both sides ofth'e chart. l,

lVith Vthe vv -rlrin'gpartsof 7the, scale as meintest Seebad au. smbled ,onthe base eaftingeet'ti'ill be .Seerhat the whole .may besnelose'siii eheiisingeleng which' need net ,interfere iith T91" aietthe brera.- tion of. theiseme .-Ilbis lioilsilg'joi: @Sing 'iS conrenentljf t. .'rlefl. .0i .Hime-reife; with the neeessary' "lesswndnys in twdieit. e parte Tbereis t. ebttom. bever, ot'heusmg R wheltisredin eee werden@ 'on the edge of the base' castlig,'"tliis -tlspigaflljjbein done before, the Pletrm'pdel"isset ingecewhiqt timing"- hQLdAAbeMLWGW the xjfse in many scales :it

en-vee veel ofthe,

chfart is driwnltaut' eerireliientlr.

les.

base casting as indicated in Fig. 5. The upright portions of the working parts of the scale are enclosed by front and rear housings S and S' which are fastened together by marginal screws and to the base casting by screws which may be inserted from the under side of the base casting, so as to ,avoid any break in the smooth. contour ,lines of the enclosure.

As a convenient means vfor giving access to the pendulum and parts associated therewith, the front and rear casings S and S Vmaybe provided with oval openings covered by platess,'s,and if desired the centers of the plates s, 's' may constitute surfaces againstvwhich. rubberpads or buffers s? may contact,shouldfunusual lateral deliection of the casing occur. These rubber buffers s are mounted on the tree B, but normally are intended to lie just out of contact with the cover plates.

For convenience in leveling-the scale, adjustable feet are provided and to determinel when it is level there is preferably provided a dial or circular spirit level T mounted on lthe top `of thelevel support A3 which forms an' integral part of the base casting. 4By mounting this level on the base casting it is obvious that the greatest certainty of 'prperlyipositioning the scale is secured, in-

'asmu'ch as thi's base casting is the. foundaf tion "u'pon'which all ofv the working parts -are'mounted5 and=in relation. to which the `scale is 'originally calibrated and sealed.

i The accurate application of the-casing or the 'fleverfwithftwo screw socketsV *Fig 5) "o the receptionrfofrscrews"V ig; 2),

' '-What is claimed is -disto'rt-ion or warping. oftheA same therefore becomes'iof little moment and save for ap- *pearancesmay bel ignored, without in any Wise 'iecti'iig 'fthe' operativeness" or accuracy "properly leveling and positioning lthe .mechamsm.

'"shipi'nent, and2 injorder to' make provision ffo'r Vpermittingl of partsbeing held out of 'iigagement, 'suchjaswill not require the I'ierchant 'receiving-'the scale to take `the saine' apart, I have provided theV platform whicli'f'scre'ws"will'draw the platform lever .upf'and'hold it'firmly away from its bearings. In addition,the yoke is provided with -ajscrewfsocket V2`with which a screw V3 j(Fig.' 2) cgi-operates for drawing the yoke -up away from itsbearings. By the simple removal of these'three screws the lever and oke are permitted to dropdownto their .hearings and the scale-is ready for use.

'In a price scale of thexfan'chart type, `ad'isl'i'like base casting having supporting projections on the under side and inside upwardly projecting Y lever bearings, `and tree support integral therewith, in combination with an upwardly. projecting tree mounted rigidly on the4 tree'SllPPOrt and carrying at its upper end the chart and bearin s for the pendulum and check and an enc osing housing mounted on the base casting and enclosing but independent of the said upwardly extending supports for the o erating parts of the scale. l

2. n a price scale of the fan chart type, a dish-like base casting having inside upwardly projecting lever bearing supports` and an upwardly projecting tree support, the edge of the casting and the top of said supports being finished in a single plane. ofa tree for carrying. the chart and pendu- .lum indicator bearings mounted rigidly on the tree support, and an enclosing housing mounted on and positioned vbyftlie edge of the base casting and enclosing but independent of the tree and supports lfor the working parts of the scale.V t 3. In a price scale of the fan chart type, a 'dish-like base casting having integralflever bearing'supports, a tree, support, and a lever support projectingup'wardly from its inner side, said supports and the edge of the base casting being finished in a single plane. i t 4. In a price scale, abaseb casting ,carrying the supports for,the `leverpivotsq4 a lever pivotally mountedi'iii'said' supports, a yoke pivotally mounted on the lever and a platform mounted on thefyoke, in,'e0mbination with a dashpot mounted ond'lthe base casting. at apoint centrally between `the yoke pivots, and a plunger.in4 the ,dashpot connected with the tyokeat:substantially the a` central dashpot openin therein fand lever pivotsupports laterally visposed relai tionfto said opening, a' lever. inounted fin bearings thereon, a lever pivotally mounted 1,20

in said bearings, a yoke pivotally mounted on the lever, a housing forming a covering for said base, lever and yoke, and co-opei'- ating liftin elements in said housing, lever and yolie for elevatin yoke 'off their respective earin 7. -fIn a price scale of the., fan 'art type, the combination of a base having-lever bearings therein, a lever pivoted .in said bearings, a yoke pivotally mounted on said 1- said lever and .125

ver, said yoke and lever each having screwthreaded sockets'therein, a covering Vfor said base, yoke and lever and screwscarried in said covering adapted to co-operate with the sockets in theyoke and lever for raising Said yoke and lever off of their respective bearings. i

8. In a price scale, the combination with a base casting, :a lever pivoted on the base,

a yoke pivoted sleeve and me'ans'aecessible above the casing coverin for regulating thelow of'fi'uid in the daspot. Y

9.l In a price scale, the combination with the bas`e"af lever 'pivotally mounted on'the lr base,` aA yoke pivoted on the leverand appiatorrh carried by' 'said yoke, of vibration 'regulating mechanism comprising a' idashpot, Aa dashpot cov era`sleeve extending up through the pover, a :plunger in said vclashpot, a plunger stem extending upthrough the sleeve -and'detachabl'y 'connected' to said yoke,

"said st'inbein'g 'spaced from 'said sleeve; and

a'. tapered :srew- ,plug *carried* en -saidstem forlsingthe opening between the stem and sleeve' when said stem' is' dctaohed from 120. ,Ina price scale, thecombination with a scale housing, 'ova vibration regulating device comprising a 1ashpot,fv af-dashpot cover, a plunger, afplu'ngerstem, there 'b'e'ing "fluid-passages' 'n"sad 'stem "opening on" opsurrounding 'said stem-V and the"exteiior ofy the scale' housing fr'reg- Zulatingthe 4-flow "oi iiuidithrghj the passages 1n the"stem.' f-P i 11. Ina price scale, the combination of ,the'scalehousing da'shpt, a dashpot; lcover,

"al 'pliindeigi a 'plunger ster'r'g'having fluid 'pasthe scale housing, a'd'ashp'ot, a'dashpotf cover,

a plunger, a vplunger 'str-em'having fluid 'passages therein opninfrf on opposite'sides of menne-gen and 'a Seeve' Surrounding A and rotatable on lsaid'steln` said sleeve having Aand yoke, an' upward 'ported a plurality of apertures-therein adapted to register with the iiuid passage openings in the stem whereby thciiow of fluid through said. passages canhbe varied at -will and means on the exterior of the scale housing for rotating the sleeve on said stein.

4lE.-In a price scale, the combination of the scale housing, adashpot, a dashpot cover, ccncentrically arranged spaced sleeves extending upwardly carried onV "one of said Sleeves for closing the opening between the two sleeves, a plunger,;a plunger stem having fluid passages thereinlopeningon oppositesides of the plunger, and means onone of said sleeves :for `varyn the size oisaid-iluid passage openings-sai ing'accessible from housing;f

.14."In a sc le of the fan chart type, the combination with a base casting carrying the leverflandrfyoke, ;of';-an` upwardly eX- ,the exterior of the scale through 4said cover, means last mentioned means betending -treemountedrigidlyi on `the base casting, a chart mounted onthe upper end ot thetree, pendulumand indicator mechamsm -fmoi'ably supported theitree, and a casing mountedt on 'the base'casting and Surroundingbut independent of the tree and partsfcarried thereby@I u.

15e-.In assiale oftheiaacliart Wrath@ C0m bmat'on 0f ai basemaetn @raming 'thellerer y extending tree mounted rigidly on'thebasecasting, achart, a pen dulum weight 4 andi .-indieator; on' Pthe tree, sto'paon the tree foilimitng ihemovementv of thependlum'wei'ght-and indicator in both direetiolisnand' fadmggon Ithe base casting enclosingfthe tree v'andgparts carried thereby :Saidtasing" .being f QITIIQIY ty, the waarneemt.independentil of. said tree and .thoj-:partsfcarriedby said tree.

rejecting', .tree @sig-idly i mounted vthreon, -v-r evercpisvetally mou-n. d `L yoke` piiotally .mellntodffon ,tlieflever and Qn thefbase casting,

substantiallyeparallo with '.the. tree, ai cheek link:- .c'oiinetzting'v the upper. ends of; the -infin andrftrees .fandga teasing-,endorsing 'said :tree andy a'm, said casngfbeingfinde :indent-.of said tree; arm andfohekf Elink' W, erbyqthe operativeness oisaid'parts is unaleeted by 17. In a Scaler ofjgfthe' fan chart typega yoke. formed oa-"single-integrals castin havmga-'base po-rtion'open ,attire center an with -1aterl1y-arran ed@ vbearings"and .an upwardly extending c 'eelt-inria,at substantiallyJ right anglesftothe hase., .Seid elim ,at its angular portion being-:provided'iwith websl or iiangea4 11203 M SSQMQITS deflection. *lz-ilpan ,etal o ffth typ@ '-specied, a

lever and yoke and a platform support or lever, a yoke and a transparent platform spider carried by the yoke and provided mounted on the yoke, in combination with with three substantially equally spaced plata dashpot connected with the yoke beneath 10 form supporting and engaging parts rigidly the platform and a regulating arm for the 5 connected together, whereby a single plane dashpot located beneath but in position to support for the platform is formed. be observed throu h the platform.

19. In a scale of the type specified, a JA ES D. MoGR-EGOR. 

